For improving the diffraction efficiency of photonic lattice and shortening lattice writing time,a 488 nm semiconductor laser and a 532 nm Nd:YAG solid laser are respectively used to write one-dimensional photonic lattice in double doped Mg:Fe:LN and Fe:LN crystal with the same doped Fe concentration. The relationship between the maximum diffraction efficiency and time of the photonic lattice in the crystal is compared and researched. Experimental results show that the photonic lattice writing time in double doped Mg:Fe:LN crystal is shorter than that of Fe:LN crytal and the diffraction efficiency is higher than that of Fe:LN crystal.